Hi,
This plugin can't be used with HikaShop as this is a plugin for VirtueMart.
Note however that HikaShop comes with both SIPS ATOS and PayBox payment plugins and one of them should be able to work with e-transaction. So you can already use HikaShop to accept payments with your bank.
What you need is to sign a "contract de vente à distance" with them and check with them the payment solutions they offer (PayBox, SIPS ATOS, others ?) so that you can configure the corresponding plugin in HikaShop.
I believe that crédit agricole supported ATOS SIPS in the past and then switched to PayBox a few years back but I'm not sure.